I Opened the Golden Finger at the End of the Tang Dynasty and Recreated the Prosperous Age of the Tang Dynasty

In the third year of neutralization, winter. The cold wind at Yanmen Pass carried snow particles and made the city walls rattle. When Li Yan opened his eyes, he found that he had transformed into a criminal auxiliary soldier in the late Tang Dynasty. The identity of the original owner is bizarre - a direct descendant of Emperor Taizong Li Shimin of the Tang Dynasty. However, because of his involvement in a power struggle, he was sent to the frontier and became cannon fodder that everyone can bully. What's worse is that Huangchao's rebel army is pressing down outside the city, and the food and grass in the city are about to run out. There are 47 old, weak, sick and disabled people, and they can't defend the three hundred dead soldiers. Others who traveled through time were all princes and princes, but he started in hell mode. But he happened to have—— Unparalleled emperor system! Modern military industry knowledge! Advanced tactical thinking! In the first battle, he defeated 300 rebels with 47 men, and the battle shocked northern Xinjiang. After rescuing Su Qingwan, a young lady from a noble family who was living in exile, she became a housekeeper of the internal affairs. He conquered the female general Qin Ningshuang, formed three thousand cavalry, and became the most terrifying cavalry commander in Northern Xinjiang. In the blacksmith shop, he improved the Mo Dao, mass-produced the magic weapon, and the combat power of the entire army skyrocketed. In the military camp, he used modern military training to train a group of rough guys into the strongest iron army in the late Tang Dynasty. People are dying of hunger? He used advanced farming skills to achieve a bumper harvest, which shocked the whole county. The rebel army covets you? He struck out with thunder, beheaded the generals, captured the city, and swept across the northern frontier. Is Zhu Wen afraid? Li Keyong is scared? Did the Khitans flee after hearing the news? Li Yan sneered: Troubled times? I'll decide. Poor and weak? I'll change it. Datang? I come to revive. From a criminal to an emperor, from the frontier to the Central Plains, he used modern wisdom to forcefully set off an earth-shaking revolution in the late Tang Dynasty. The world is in chaos, I will bring peace. I will crush all the heroes in the late Tang Dynasty. Li Tang Sheji, I will revive it!